Sugar accumulation and partitioning in Satsuma mandarin tree tissues and fruit in response to drought stress

Hiroshi Yakushiji, Kunihisa Morinaga, Hiroshi Nonami

Research output: Contribution to journalArticle

86 Citations (Scopus)

Abstract

Mechanisms of sugar accumulation in response to drought stress in Satsuma mandarin (Citrus unshiu Marc.) fruit were investigated. Predawn leaf water potentials averaged -0.35MPa for well-watered, -0.60 MPa for moderately drought-stressed, and-1.00 MPa for severely drought-stressed glasshouse-grown 3-year-old trees. Fruit peel turgor and fruit growth of the moderately drought-stressed trees recovered to a similar value to that of the well-watered trees. Photosynthetic rates and stomatal conductance of both moderately and severely drought-stressed trees were significantly lower than those of the well-watered plants. However, the total sugar content per fruit of moderately drought-stressed trees was the highest among the drought treatments. A 13C-labeling experiment showed that 13C distribution in fruit grown under the moderately drought-stressed condition was the highest. These findings indicate that sugar accumulation in fruit was caused by an increase in translocation of photosynthates into fruit, especially into the juice sacs, under drought stress.

Original languageEnglish
Pages (from-to)719-726
Number of pages8
JournalJournal of the American Society for Horticultural Science
Volume123
Issue number4
Publication statusPublished - 1998
Externally publishedYes

Fingerprint

satsumas
Droughts
Fruit
water stress
drought
sugars
fruits
Citrus unshiu
fruit peels
photosynthates
turgor
tissues
leaf water potential
sugar content
Citrus
stomatal conductance
juices
greenhouses

Keywords

  • Citrus fruit
  • Fruit growth
  • Low water potential
  • Osmotic adjustment
  • Photosynthates
  • Sink
  • Translocation
  • Turgor

ASJC Scopus subject areas

  • Horticulture
  • Plant Science

Cite this

Sugar accumulation and partitioning in Satsuma mandarin tree tissues and fruit in response to drought stress. / Yakushiji, Hiroshi; Morinaga, Kunihisa; Nonami, Hiroshi.

In: Journal of the American Society for Horticultural Science, Vol. 123, No. 4, 1998, p. 719-726.

Research output: Contribution to journalArticle

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